diff options
| -rw-r--r-- | drivers/net/wireless/wl12xx/wl1251_sdio.c | 40 |
1 files changed, 34 insertions, 6 deletions
diff --git a/drivers/net/wireless/wl12xx/wl1251_sdio.c b/drivers/net/wireless/wl12xx/wl1251_sdio.c index c561332e700..b901b613565 100644 --- a/drivers/net/wireless/wl12xx/wl1251_sdio.c +++ b/drivers/net/wireless/wl12xx/wl1251_sdio.c @@ -37,11 +37,17 @@ #define SDIO_DEVICE_ID_TI_WL1251 0x9066 #endif +struct wl1251_sdio { + struct sdio_func *func; + u32 elp_val; +}; + static struct wl12xx_platform_data *wl12xx_board_data; static struct sdio_func *wl_to_func(struct wl1251 *wl) { - return wl->if_priv; + struct wl1251_sdio *wl_sdio = wl->if_priv; + return wl_sdio->func; } static void wl1251_sdio_interrupt(struct sdio_func *func) @@ -90,10 +96,17 @@ static void wl1251_sdio_write(struct wl1251 *wl, int addr, static void wl1251_sdio_read_elp(struct wl1251 *wl, int addr, u32 *val) { int ret = 0; - struct sdio_func *func = wl_to_func(wl); - + struct wl1251_sdio *wl_sdio = wl->if_priv; + struct sdio_func *func = wl_sdio->func; + + /* + * The hardware only supports RAW (read after write) access for + * reading, regular sdio_readb won't work here (it interprets + * the unused bits of CMD52 as write data even if we send read + * request). + */ sdio_claim_host(func); - *val = sdio_readb(func, addr, &ret); + *val = sdio_writeb_readb(func, wl_sdio->elp_val, addr, &ret); sdio_release_host(func); if (ret) @@ -103,7 +116,8 @@ static void wl1251_sdio_read_elp(struct wl1251 *wl, int addr, u32 *val) static void wl1251_sdio_write_elp(struct wl1251 *wl, int addr, u32 val) { int ret = 0; - struct sdio_func *func = wl_to_func(wl); + struct wl1251_sdio *wl_sdio = wl->if_priv; + struct sdio_func *func = wl_sdio->func; sdio_claim_host(func); sdio_writeb(func, val, addr, &ret); @@ -111,6 +125,8 @@ static void wl1251_sdio_write_elp(struct wl1251 *wl, int addr, u32 val) if (ret) wl1251_error("sdio_writeb failed (%d)", ret); + else + wl_sdio->elp_val = val; } static void wl1251_sdio_reset(struct wl1251 *wl) @@ -197,6 +213,7 @@ static int wl1251_sdio_probe(struct sdio_func *func, int ret; struct wl1251 *wl; struct ieee80211_hw *hw; + struct wl1251_sdio *wl_sdio; hw = wl1251_alloc_hw(); if (IS_ERR(hw)) @@ -204,6 +221,12 @@ static int wl1251_sdio_probe(struct sdio_func *func, wl = hw->priv; + wl_sdio = kzalloc(sizeof(*wl_sdio), GFP_KERNEL); + if (wl_sdio == NULL) { + ret = -ENOMEM; + goto out_free_hw; + } + sdio_claim_host(func); ret = sdio_enable_func(func); if (ret) @@ -213,7 +236,8 @@ static int wl1251_sdio_probe(struct sdio_func *func, sdio_release_host(func); SET_IEEE80211_DEV(hw, &func->dev); - wl->if_priv = func; + wl_sdio->func = func; + wl->if_priv = wl_sdio; wl->if_ops = &wl1251_sdio_ops; wl->set_power = wl1251_sdio_set_power; @@ -259,6 +283,8 @@ disable: sdio_disable_func(func); release: sdio_release_host(func); + kfree(wl_sdio); +out_free_hw: wl1251_free_hw(wl); return ret; } @@ -266,9 +292,11 @@ release: static void __devexit wl1251_sdio_remove(struct sdio_func *func) { struct wl1251 *wl = sdio_get_drvdata(func); + struct wl1251_sdio *wl_sdio = wl->if_priv; if (wl->irq) free_irq(wl->irq, wl); + kfree(wl_sdio); wl1251_free_hw(wl); sdio_claim_host(func); |